XML
Don't forget to add Internet Permission.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/btnShowTweets"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="showTweets"
android:text="Show Tweets!" />
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/tvJson"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Tweets:" />
</LinearLayout>
</ScrollView>
</LinearLayout>
JAVA
package com.example.jsontwiter;
import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
TextView tv;
// json used in async task do in background
JSONObject jsoon;
HttpClient client;
//Url from where data is retrived
final static String URL = "http://api.twitter.com/1/statuses/user_timeline.json?screen_name=";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView)findViewById(R.id.tvJson);
// In execute () write what we need to retrieve , it is the key reference . Here we need the tweet i.e tweet
// is the key reference or maybe 'created at' key from twitter . Enter this address in your browser //http://api.twitter.com/1/statuses/user_timeline.json?screen_name=mehviish . You can see various keys .text //is the tweet.
new Read().execute("text");
}
//Creat a method called lastTweet and add exceptions.
public JSONObject lastTweet(String username) throws ClientProtocolException , IOException , JSONException{
client = new DefaultHttpClient();
StringBuilder urll = new StringBuilder(URL); //give above url
// In append add whatever is passed in the above STRING name i.e username
urll.append(username);
HttpGet get = new HttpGet(urll.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
// 200 is sucesful
if (status == 200) {
HttpEntity entity = r.getEntity();
String data = EntityUtils.toString(entity);
JSONArray timeline = new JSONArray(data);
// 0 coz we are retieving last tweet we can also keep any other number.
JSONObject last = timeline.getJSONObject(0);
return last;
}
else
{
Toast.makeText(MainActivity.this, "Error",
Toast.LENGTH_SHORT).show();
return null;
}
}
public class Read extends AsyncTask<String, Integer, String>
{
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
// set json object equal to the method that we created above and in arguements give the id/username whose tweets you want to retrieve .
try {
// surrond with try catch
jsoon = lastTweet("mehviish");
// to return position 0 set param 0
return jsoon.getString(params[0]);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
tv.setText(result);
}
}
}
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